Tube Plugs

Heat Exchanger Tube Isolation

The Tube Plug consists of a tapered spindle and sleeve, which expands when tightened to ensure a close metal-to-metal fit with the tube wall. Its unique design allows for easy installation, quick and accurate fitting, and equally easy removal if re-tubing or other extensive tube repair work is required. Each Tube Plug is packaged with full instructions.

Plug not set.
Plug set, creating metal to metal seal between sleeve of plug and inside diameter of tube.

Potentially dangerous techniques such as using conical plugs, which can often become lethal ‘projectiles’ if forcibly ejected due to pressure build-up during dismantling can be avoided by using our tube plugs. Likewise, the need to employ exploding and welding techniques is eliminated.

Furmanite’s Tube Plugs are available in a variety of materials and sizes to suit virtually every need. Materials for spindles, nuts and bushes range from carbon steel for normal applications, to heat and corrosion resistant metals for use in the harshest conditions. Our standard in-stock supply of sizes will accommodate most tube diameters and gauges. However, specific situations that require special sizes can be made to order.

Tube Plugs

Typical Heat Exchanger




If a heat exchanger tube fails it can be isolated using a Furmanite Tube Plug





Tube Plugs – The Safest Solution For Your Tube Sealing Requirements

Designed with plant safety and reliability in mind, Furmanite’s tube plugs are the standard in providing quick and effective isolation of tube leakage for a variety of heater, condenser and heat exchanger applications.

Furmanite’s plugs are able to isolate a leakage with no need for explosives or welding.

They are also quick and easy to install and remove.

Furmanite - Innovative since 1920

Leak Sealing process developed leak-sealing-developed_thumb 01/01/1920

Furmanite Leak-Sealing process is Developed The under pressure Leak Sealing process is developed by Eugene Clay Furman at the Newport …

First DIY Leak-Sealing Kit old-furmanite-leak-sealing-equipment 01/01/1924

First DIY Leak-Sealing Kit The first do-it-yourself Leak Sealing kits were developed and marketed by Clay Furman and while they …

Long Standing Relationships Sales-Brochure-1926_thumb 01/01/1926

Long Standing Relationships US customer reference list that includes individual war ships in the US Navy, US steel companies and …

1st Patent is filed in 1927 furmanite-patents1 01/01/1927

1st Patent is filed in 1927 The Furmanite patent for the leak sealing process filed in 1927 was the first …

Furmanite moves Overseas Liverpool-Exibition_thumb 06/01/1927

Furmanite moves Overseas First overseas agents appointed to market the leak Sealing kits including in the United Kingdom and Euro…

Costs of a steam leak Sales-Brochure-1926-pg-8_thumb 06/01/1928

Price List from 1926 Table detailing costs of allowing a steam leak based on $4 per ton for “Long coal”. …

Furmanite is thinking global furmanite-the-skys-the-limit_thumb 01/01/1929

Furmanite is thinking global A brief history of the United Kingdom Company written by A W Forsyth (OBE) in September 1973 …

Technology Development leak-sealing-diagram 11/22/1934

Technology Development Furmanite Expands Engineering on Leak Sealing Technology. Photographs taken from a 1934 sales brochure together with schematics of …

Growing Furmanite purchase-letter_thumb 05/01/1960

Growing Furmanite Letter from the Chairman of Furmanite Engineering based in Birkenhead, England to his lawyer requesting information on a …

New Direction New-Technology_thumb 01/01/1966

New Direction Alan Forsyth, acting as a consultant to Furmanite Engineering (1929) advised the Board to move from selling low …

Never compromise on the high quality Company-History-July-1979_thumb 07/01/1979

Never to compromise on the high quality A brief history of the United Kingdom Furmanite organisation written by Joyce Hainsworth, the …

Best in the business were called NASA---Discovery-Team_thumb 09/01/1988

Best in the business were called Furmanite successfully seals nitrous oxide leakage on the Space Shuttle “Discovery” pre launch September …

Start of Modern Furmanite company-overview 11/22/1991

Start of Modern Furmanite The common shares of Furmanite were acquired by Kaneb Inc on 24th January 1991. Furmanite remains …

Acquisition-GSG Division Acquisition-GSG-Division_thumb 01/13/2006

Acquisition of Flow-Serve GSG Division Furmanite as part of Xanser Corporation acquired the General Services Group (GSG) of Flow-Serve corporation …

Corporate Name Change Corporate-Name-Change_thumb 01/13/2007

Corporate Name Change Xanser Corporation (NYSE:XNR) changed the company’s name to Furmanite Corporation, and the company’s shares were traded on …

Acquisition of SLM Acquisition-of-SLM_thumb 04/13/2011

Furmanite Corporation Acquires Self Leveling Machining Technology Furmanite expanded  its global on-site machining capabilities through the acquisition of Self Leveling …


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